KR100924821B1 - Spray coating apparatus - Google Patents

Abstract

PURPOSE: A thermal spraying device is provided to prevent powder from blocking an outlet of a spraying nozzle in order to facilitate a coating process. CONSTITUTION: A thermal spraying device comprises a body(10), guide panel(20), gas nozzle body(30), inner frame(40), outer frame(50), and powder nozzle body(60). The body includes an air hole and powder hole. The guide panel comprises a gas hole, and receiving groove with air communication hole and powder communication hole which communicate with the air hole and powder hole respectively. The gas nozzle body comprises a hollow hole and a plurality of gas spraying holes. The inner frame comprises a settling portion, top panel, and bottom panel. The outer frame is combined with the guide panel and cools the gas nozzle body. The powder nozzle body is cooled by the air expelled from the air communication hole at the same time spraying the powder.

Description

Thermal spraying equipment {SPRAY COATING APPARATUS}

The present invention relates to a thermal spraying apparatus for coating the appearance of the steel structure, the inside and outside of the SUS storage tank, the inside and outside of the mechanical parts, the inside and outside of the cement structure and the inside and outside of the water and sewage pipes, By means of self-cooling means inside and outside of the device to prevent the internal temperature of the thermal spray device from rising, it prevents the decrease of mechanical strength and the damage of the internal parts, and the powder to be sprayed after a certain distance The present invention relates to a spraying device capable of achieving a smoother coating operation by preventing a phenomenon in which the outlet side of the spraying device is blocked by powder so as to melt.

In general, thermal spraying refers to a high speed spraying of particles that are molten or close to heat by heating wires and powders such as metals or ceramics by a thermal spraying device using combustion and ionized gas, explosion gas, and electrical energy as heat sources. By forming a coating layer on the surface of a material, it is used to increase the wear resistance, corrosion resistance, heat resistance, chemical resistance, etc. of parts and products significantly, or to impart electrical conductivity, insulation, and heat conductivity control characteristics.

In addition, in order to achieve the optimum coating by the thermal spraying method, the spraying angle of the thermal spraying apparatus must be maintained at a right angle or a constant angle with respect to the coating surface. In addition, the distance between the object to be coated and the thermal spraying device must be kept substantially constant since it affects the speed and temperature at which the molten metal particles are deposited on the object, and the temperature of the material and the deposited metal.

Such spraying work is performed by a worker by hand using a hot water spraying coating or by mounting a hot water spray on a conveying device. In this case, the transfer device of the thermal spraying device uses a multi-articulated robot arm or an auxiliary device capable of horizontal, vertical and shanghai transport.

However, the conventional thermal spraying molten powder through the high-temperature combustion flame to coat the object, when the continuous coating operation using the thermal spraying the internal temperature of the thermal spraying apparatus is raised to mechanical It causes a decrease in strength and damage of internal parts, and powder is melted inside the spraying device by the heated spraying device before it is discharged to the outside of the spraying device. In order to solve such a problem, the work is stopped, the heated spray device is cooled for a certain time using a separate equipment, and the cumbersome inconvenience of having to remove molten powder from the inside of the thermal spraying device and work again. have.

In addition, the powder melted by the thermal spraying device is sprayed only in a straight line with respect to the object, so that the range of coating the pipe is limited, which requires a large amount of time required for the coating operation. Since the powder is directly melted with the combustion flame at the exit of the spraying device, there is a problem of blocking the inlet of the spraying device.

The present invention has been made to solve the above-mentioned problems of the prior art, by providing a means for cooling itself inside and outside the thermal spraying apparatus to suppress the increase in the internal temperature of the thermal spraying apparatus, thereby lowering the mechanical strength And spray the powder to prevent the damage of the internal parts, and the sprayed powder meets the combustion flame after a certain distance to prevent the outlet side of the thermal spraying device to be clogged by the powder to achieve a more smooth coating work The purpose is to provide.

Another object in addition to the present invention is that the powder is circulated in the interior of the spray device to spread the spray direction, and the sprayed powder is discharged after a certain distance from the spray device to meet the combustion flame to maximize the spraying force, It is also to provide a thermal spraying material which has excellent paint area, distribution and adhesion on the surface of sewer pipes.

Means of the present invention for achieving the above object is an air hole for supplying air is discharged to the branch is formed, the body portion is formed with a powder hole for supplying and discharging powder, the gas hole for supplying and discharging gas In addition, the receiving groove is formed in the center, the receiving groove is formed in the air communication hole and the powder communication hole communicating with the air hole and the powder hole of the body portion, respectively, the guide panel coupled to the body portion, the center A hollow nozzle is formed in the gas nozzle body and a plurality of gas injection holes for injecting the gas are formed therein, a seating portion on which the gas nozzle body is seated, and is formed to be bent upwardly from the seating portion and formed along a plurality of circumferences. An upper panel formed with two air through holes, extending downwardly from the seating portion, and a plurality of gas through holes formed along the circumference An inner frame consisting of a lower panel, an outer frame coupled to the guide panel and cooling the gas nozzle body, and a lower side thereof are mounted in the receiving groove of the guide panel, and an upper side passes through the hollow hole of the gas nozzle body. In the inner circumference, an injection hole communicating with the powder communication hole of the guide panel is formed, and is made of a powder nozzle body for injecting powder introduced while being cooled by air discharged from the air communication hole of the guide panel.

According to the thermal spraying apparatus according to the present invention, the cooling air discharged to the branch through the body portion reaches the powder nozzle body and the outer frame heated by the high-temperature combustion flame, respectively, thereby cooling, thereby reducing the mechanical strength and the internal parts. It is effective to prevent their damage.

In addition, the injection hole applied in the present invention is to be melted by the combustion flame after the injection of the powder is sprayed for a certain distance, the eddy induction nozzle provided in the injection hole so that the powder can be injected as the eddy in the powder melted by the combustion flame This prevents the phenomenon of blocking the outlet side of the injection port can achieve a more smooth coating work, thereby maximizing the injection force has the effect of excellent coating area, distribution and adhesion to the surface of the water and sewage pipe.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be more apparent.

1 is an exploded perspective view of the spray device according to the present invention, Figure 2 is a combined perspective view of the spray device according to the present invention, Figure 3a is a front perspective view of the body portion applied to the spray device according to the present invention, Figure 3b is Figure 3a 4A is a front perspective view of the guide panel applied to the spraying device according to the present invention, FIG. 4B is a cross-sectional view of the spraying device according to the present invention, and FIG. 5 is a sectional view of FIG. 5A, FIG. 6A is a front perspective view of an inner frame applied to the spraying device according to the present invention, FIG. 6B is a sectional view of FIG. 6A, and FIG. 7A is a front view of a gas nozzle body applied to the spraying device according to the present invention. 7B is a sectional view of FIG. 7A, FIG. 8A is a front perspective view of an outer frame applied to the spraying device according to the present invention, FIG. 8B is a sectional view of FIG. 8A, and FIG. 9 is a view of the spraying device according to the present invention. 10 is a cross-sectional view of the coupling, Figure 10 is an embodiment of a spraying apparatus according to the present invention.

1 to 9, the thermal spraying apparatus 1 according to the present invention includes a body portion 10, a guide panel 20, a gas nozzle body 30, an inner frame 40, and an outer portion. Frame 50 and the injection nozzle body, the thermal spraying device 1 is a method that the operator grips directly, the method of mounting on the articulated robot arm (not shown), and can move vertically, horizontally, up and down And, it can be installed in the well-known pipe repair and transport device (5) having a 360 ° rotation function, the appearance of the steel structure, the inside and outside of the SUS storage tank, the inside and outside of the mechanical parts, the inside and outside of the cement structure, phase, Used to coat the inside and outside of sewer pipes.

First, the body portion 10 is formed in a rectangular shape having a predetermined width and thickness, the air hole 11 for supplying and discharging air, and the powder hole 12 for receiving and discharging powder is formed, the upper side A pair of bolt holes 13 are formed in the part.

The powder may be a thermosetting resin powder such as epoxy, urea, urethane, or a thermoplastic resin such as PE, PP, PVC, TEFLON, NYLON, or the like.

The air hole 11 extends vertically in one direction from a central portion of the internal cooling air hole 11a and the internal cooling air hole 11a, which are perforated in a straight line from the rear to the front, and is bent in the middle. It is divided into an external cooling air hole (11b) so as to be perforated. In this way, the perforated internal cooling air hole 11a discharges the injected air in a straight line, and passes through the transfer nozzles 63c and 64a of the lower mounting portion 63 and the central mounting portion 64 to the inside of the upper mounting portion 65. To reach the cooling nozzle (65c), the external cooling air hole (11b) is the air passing through the air communication hole (23 ') of the guide panel 20 and the inner frame (40) 43 to reach the external cooling nozzle 54 of the outer frame (50).

The guide panel 20 is formed in a hexagonal shape having a constant width and thickness, the lower side is formed with a gas hole 21 for supplying and discharging gas, the receiving groove 22 is further formed in the front center portion, The receiving groove 22 has an air hole 11 of the body portion 10, that is, an air communication hole 23 communicating with the internal cooling air hole 11a and a powder communication hole communicating with the powder hole 12. 24 are formed respectively, and an air communication hole 23 'is further formed on the receiving groove 22 to communicate with the external cooling air hole 11b.

In the gas, a flammable gas such as LPG, LNG, and methane may be used.

In addition, a plurality of bolt grooves 25 are formed on the front surface of the guide panel 20 along the circumference to couple the outer frame 50 to the bolts B, and a pair of bolt holes of the body portion 10 is formed on the rear surface of the guide panel 20. A bolt groove 25 'is formed in communication with the 13 is coupled to the body portion 10 and the bolt (B).

The gas nozzle body 30 is formed with a hollow hole 31, a plurality of gas injection holes 32 are formed in the inner circumference to inject the gas discharged from the guide panel 20 to the outside, the gas is injected If a fire is generated in the combustion flame, the gas nozzle body 30 is seated on the seating portion 41 of the inner frame (40).

In the above gas injection hole 32 is formed in a diagonal line from the rear side toward the front outer side and the powder injected through the injection hole 61 after a predetermined distance, for example, after about 1 ~ 2 cm from the exit of the injection hole 61 It meets the combustion flame generated in the nozzle body 30 to be melted to induce the coating on the inner and outer surfaces of the water and sewage pipes (P).

The gas injection hole 32 drilled as described above prevents the powder from melting directly at the outlet of the injection port 61, thereby preventing the phenomenon of blocking the inlet of the injection port 61 due to the powder, thereby smoothly coating the water and sewage pipe P. Make it happen.

In addition, a plurality of mounting grooves 33 are formed on the outer circumference of the gas nozzle body 30 to be symmetrical in the up and down directions, and the rubber packing 34 for maintaining the airtightness is further formed in the mounting grooves 33. It is fastened to prevent the gas passing through the gas passage hole 45 of the inner frame 40 flows to the outer frame 50 side and is discharged to the outer cooling nozzle 54 together with the air.

The inner frame 40 is composed of a seating portion 41, the upper panel 42 and the lower panel 44.

The seating part 41 is formed along the circumference of the inner circumference of the inner frame 40, and the gas nozzle body 30 is seated.

The upper panel 42 extends bent upward from the seating portion 41, and a plurality of air passage holes 43 are formed along the circumference. The air passage hole 43 passes air discharged from the air communication hole 23 ′ of the guide panel 20, and the air passes through the external cooling nozzle 54 of the outer frame 50. Is discharged.

The lower panel 44 extends downwardly from the seating portion 41, and a plurality of gas passage holes 45 are formed along the circumference. The gas passage hole 45 passes the gas discharged from the gas hole 21 of the guide panel 20, and the gas passes through the injection hole of the gas nozzle body 30 to the outside.

In addition, an air passage hole 43 and a protrusion 46 for dividing the gas passage hole 45 are further formed on the rear surface of the inner frame 40, and the protrusions 46 form a pair and have a predetermined distance therebetween. It is formed so as to be spaced apart between the protrusions 46, the empty space between the protrusions 46, the discharge from the gas hole 21 and the external cooling air hole (11b) of the guide panel 20. The rubber packing 47 is further fastened to allow the gas and air to be partitioned and passed without being mixed, and the inner frame 40 is formed of a hollow body to allow the powder nozzle body 60 to pass therethrough.

In addition, the outer periphery of the inner frame 40, the mounting groove 48 is formed along the circumference, the mounting groove 48 is a rubber packing 49 for maintaining the airtight with the outer frame 50 is further Is fastened.

The outer frame 50 is coupled to the front surface of the guide panel 20 to fix the gas nozzle body 30, the inner frame 40 and the powder nozzle body 60, while cooling itself, the gas nozzle It is provided to cool the main body 30 and consists of a bottom part 51, a vertical panel 52, and the fixing jaw 53.

A bolt hole 51a is formed at a position corresponding to the bolt groove 25 of the guide panel 20 at the periphery of the bottom 51 so that the bolt B is coupled to the front surface of the guide panel 20.

The vertical panel 52 extends vertically to the upper side of the bottom portion 51 and is formed in a hollow shape. The vertical panel 52 has a gas nozzle body 30, an inner frame 40, and a powder nozzle body inside thereof. 60) is located.

The fixing jaw 53 is formed at the upper inner circumference of the vertical panel 52 and is in contact with the upper portion of the gas nozzle body 30 to fix the gas nozzle body 30 to the inner frame 40 and the powder nozzle. The main body 60 is also fixed.

In addition, a plurality of external cooling nozzles 54 are formed in the fixing jaw 53 along the circumference, and spray the air passing through the air passage holes 43 of the inner frame 40 to open the gas nozzle body 30. Cooling, thereby solving the situation that the work is interrupted due to the heating of the gas nozzle body 30 during the coating work of the water, sewage pipe (P) to achieve a smooth coating of the water, sewage pipe (P) continuously. To help.

The powder nozzle body 60 includes an injection hole 61, a lower mounting part 63 formed at regular intervals in the longitudinal direction of the injection hole 61, a central mounting part 64, and an upper mounting part 65.

The injection hole 61 is formed on the inner circumference of the powder nozzle body 60, the inner space is formed and both sides are formed in a cylindrical shape open. The lower end of the injection hole 61 is mounted in the receiving groove 22 of the guide panel 20 to face the powder communication hole 24, whereby the powder discharged through the powder communication hole 24 is the injection hole ( It is introduced into the inner space of the 61 is injected to the outside through the upper portion of the injection hole 61, while the upper portion of the injection hole 61 is a hollow hole of the inner frame 40 and the gas nozzle body 30 made of a hollow type ( Passing through 31) is made horizontal with the upper end of the gas nozzle body (30).

In addition, the injection hole 61 is formed so that the diameter thereof is gradually widened from the lower side to the upper side so as to diffuse and spray the introduced powder, the lower side of the injection hole 61 is formed in the shape of the circumference induction nozzle 62 is diagonally formed. do.

The lower mounting portion 63 is formed on the lower outer periphery of the injection port 61, a plurality of transfer nozzles 63c are formed at equal intervals on the inner periphery of the lower mounting portion 63, the air communication hole of the guide panel 20 Pass the air discharged from (23).

In addition, any one of the transfer nozzles 63c of the lower mounting portion 63 communicates with the eddy induction nozzle 62 and the air passes through the transfer nozzle 63c in communication with the eddy induction nozzle 62. A part is introduced to the eddy guide nozzle 62, the air is injected into the inner space of the injection port 61 in an oblique shape is eddy. Accordingly, the powder located in the inner space of the injection hole 61 is circulated by the eddy air and is diffused to the outside of the injection hole 61 is injected.

As such, the powder sprayed by the spraying direction meets the flame of the gas nozzle body 30 after a predetermined distance and is evenly coated on the exterior of the water and sewage pipes P, thereby significantly reducing the working time.

In addition, the lower surface of the lower mounting portion 63 is further formed with a projection (63d) for partitioning the injection port 61 and the conveying nozzle (63c) into which the air flows, the projection (63d) is It is formed so as to be spaced apart from the injection hole 61, the packing of the rubber material is further fastened between the injection hole 61 and the protrusion (63d) to prevent the powder and air leaking and mixing with each other.

The center mounting portion 64 is formed to be spaced apart by a predetermined interval to the upper side of the lower mounting portion 63, a plurality of transfer nozzles (64a) are formed at equal intervals on the inner circumference of the transfer nozzle (63c) of the lower mounting portion (63) Pass the air through) continuously.

The upper mounting portion 65 is formed to be spaced apart by a predetermined interval to the upper side of the central mounting portion 64, the inner circumferential plurality of internal cooling nozzles (65c) is formed in a compact form, such an internal cooling nozzle (65c) is The air transported through the transfer nozzles 63c and 64a of the lower mounting unit 63 and the central mounting unit 64 is discharged to the upper portion of the injection hole 61 to cool the injection hole 61. Accordingly, the upper and the sewer pipes P By solving the situation in which the operation is stopped due to the heating of the injection port 61 during the coating operation of the) to ensure a smooth coating operation of the water, sewage pipe (P).

In addition, the rubber packing (63b, 65b) is further coupled to the mounting groove (63a, 65a) of the lower mounting portion 63 and the upper mounting portion 65 to prevent the air leaks.

An embodiment in which the thermal spraying device according to the present invention configured as described above is attached to a conveying apparatus for repairing pipelines will be described.

First, the thermal spray device 1 is mounted on a known pipe repair and transport device 5, and then a known control box (not shown) is operated to connect the guide panels 20 through the connecting pipes 2, 3, and 4. Gas is injected into the gas hole 21, and powder and air are respectively injected into the powder hole 12 and the air hole 11 of the body part 10.

The gas injected into the gas hole 21 of the guide panel 20 passes through the gas passage hole of the inner frame 40 and is discharged to the outside through the injection hole of the gas nozzle main body 30.

The powder injected into the powder hole 12 of the body part 10 is discharged to the outside through the powder communication hole 24 and the injection hole 61 of the guide panel 20.

On the other hand, the air is discharged to the branch by the internal cooling air hole (11a) and the external cooling air hole (11b) of the body portion (10). The air discharged from the internal cooling air hole 11a passes through the lower mounting portion 63 and the transfer nozzles 63c and 64a of the central mounting portion 64 formed in the powder nozzle main body 60 of the upper mounting portion 65. It is discharged to the outside through the internal cooling nozzle to cool the appearance of the injection port 61 heated by the high-temperature combustion flame. Here, a part of the air passing through the lower mounting portion 63 is introduced into the eddy guide nozzle 62 of the injection port 61, the powder is injected through the injection port 61 is jetted while blasting, the injected powder After about 1 cm to 2 cm from the outlet side of the injection port 61 is melted in the combustion flame of the gas nozzle body 30 is coated on the water and sewage pipe (P).

In addition, the air discharged from the external cooling air hole 11b passes through the air passage hole 43 of the inner frame 40 and is discharged to the outside through the external cooling nozzle 54 of the outer frame 50 at a high temperature. The gas nozzle main body 30 heated by the combustion flame of is cooled.

1 is an exploded perspective view of the spray device according to the present invention.

Figure 2 is a combined perspective view of the spraying apparatus according to the present invention.

Figure 3a is a front perspective view of the body portion applied to the spraying device according to the present invention.

3B is a cross-sectional view of FIG. 3A.

Figure 4a is a front perspective view of the guide panel applied to the thermal spraying apparatus according to the present invention.

4B is a cross-sectional view of FIG. 4A.

Figure 5a is a front perspective view of the injection hole applied to the spraying apparatus according to the present invention.

5B is a cross-sectional view of FIG. 5A.

Figure 6a is a front perspective view of the inner frame applied to the spraying apparatus according to the present invention.

6B is a cross-sectional view of FIG. 6A.

Figure 7a is a front perspective view of the gas nozzle body applied to the spraying apparatus according to the present invention.

FIG. 7B is a sectional view of FIG. 7A; FIG.

Figure 8a is a front perspective view of the outer frame applied to the spraying apparatus according to the present invention.

8B is a sectional view of FIG. 8A.

9 is a cross-sectional view of the thermal spraying apparatus according to the present invention.

10 is an embodiment of a spray device according to the present invention.

** SIGNS FOR MAIN PARTS OF THE DRAWINGS **

10: body 20: guide panel

30: gas nozzle body 40: internal frame

50: outer frame 60: powder nozzle body

Claims (13)

An air hole 11 for receiving air and discharging it to a branch, and a body part 10 having a powder hole 12 for receiving and discharging powder; A gas hole 21 for supplying and discharging gas is formed, and an accommodation groove 22 is formed in the center, and the accommodation groove 22 has an air hole 11 and a powder hole of the body portion 10. A guide panel 20 having air communication holes 23 and 23 'and a powder communication hole 24 communicating with each other; A gas nozzle body 30 in which a hollow hole 31 is formed in the center and a plurality of gas injection holes 32 for injecting the introduced gas are formed; A seating portion 41 on which the gas nozzle body 30 is seated, and an upper panel 42 formed to be bent upwardly from the seating portion 41 and having a plurality of air passage holes 43 formed along the periphery; An inner frame (40) formed of a lower panel (44) extending from the seating portion (41) downwardly and formed with a plurality of gas passage holes (45) along a circumference thereof; An outer frame 50 coupled to the guide panel 20 and cooling the gas nozzle body 30; The lower side is mounted in the receiving groove 22 of the guide panel 20, the upper side passes through the hollow hole of the gas nozzle body 30, the inner circumference of the powder communication hole 24 of the guide panel 20 And a powder nozzle body 60 formed therein, the powder nozzle main body 60 injecting powder introduced while being cooled by the air discharged from the air communication hole 23 of the guide panel 20. Spraying device. The method of claim 1, The air hole 11 of the body portion 10 is an internal cooling air hole 11a bored in a straight line, and an external cooling air hole bored to be bent in one direction from the internal cooling air hole 11a ( 11b), wherein the guide panel 20 is further provided with an air communication hole 23 'in communication with the external cooling air hole 11b. The method of claim 1, The gas injection hole 32 of the gas nozzle main body 30 is a spray device, characterized in that formed in an oblique shape so that the powder injected through the injection hole 61 after a predetermined distance. The method of claim 1, At the outer circumference of the gas nozzle body 30, a plurality of mounting grooves 33 are formed along a circumference, and the mounting groove 33 is further provided with a rubber packing 34 which is fastened to maintain airtightness. Spray device made with. The method of claim 1, An air passage hole 43 and a protrusion 46 for partitioning the gas passage hole 45 are further formed on the rear surface of the inner frame 40, and the protrusion 46 has a gas of the guide panel 20. Spraying device characterized in that it is further provided with a rubber packing (47) fastened so that the gas and air discharged from the hole (21) and the external cooling air hole (11b) is partitioned and discharged. The method of claim 1, The outer periphery of the inner frame 40, the mounting groove 48 is formed along the circumference, the mounting groove 48 is characterized in that the rubber packing 49 which is fastened to maintain the airtight is further provided Device. The method of claim 1, The outer frame 50 includes a bottom portion 51 coupled to the front surface of the guide panel 20, a vertical panel 52 extending vertically above the bottom portion 51, and the vertical panel ( A plurality of external cooling nozzles 54 formed at an upper inner circumference of the upper portion 52 and cooling the gas nozzle main body 30 by spraying air discharged from the air passage hole 43 of the inner frame 40 are surrounded by the circumference. Thermal spraying device characterized in that consisting of a fixed jaw (53) formed along. The method of claim 1, The spray nozzle (61) of the powder nozzle body (60) is sprayed, characterized in that formed to gradually widen from the lower side to the upper side so that the introduced powder can be diffused and sprayed. The method of claim 1, The spraying hole 61 of the powder nozzle body 60 is a spray device, characterized in that the eddy guiding nozzle 62 is formed in an oblique form so that the powder flowing in the lower side is circulated. The method of claim 9, The injection hole 61 of the powder nozzle main body 60 has a lower mounting portion 63 and a central mounting portion 64 and an upper mounting portion 65 provided with mounting grooves 63a and 65a in its longitudinal direction on the outer circumference thereof, respectively. Spacing is formed, the lower mounting portion 63 and the mounting grooves (63a, 65a) of the upper mounting portion 65 is sprayed, characterized in that the rubber packing (63b, 65b) is further provided to prevent the leakage of air Device. The method of claim 10, The lower mounting portion 63 and the central mounting portion 64 are further provided with a plurality of transfer nozzles (63c, 64a) for passing the air discharged from the air hole 11, the transfer nozzle of the lower mounting portion 63 Any one of (63c) is the thermal spraying apparatus characterized in that the communication with the eddy induction nozzle (62). The method according to claim 10 or 11, The internal mounting nozzles 65 have a plurality of internal cooling nozzles 65c for cooling the injection holes 61 by injecting air transported through the transfer nozzles 63c and 64a of the lower mounting unit 63 and the central mounting unit 64. Thermal spraying device characterized in that the further formed. The method of claim 10, The lower surface of the lower mounting portion 63 is further formed with a projection (63d) for partitioning the injection port 61, the powder flows into the injection nozzle (63c) is introduced, the powder 63 and the air is formed in the projection (63d) Thermal spraying device characterized in that the rubber packing (63d) is further provided to prevent leakage.

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